Certainly looked as if one engine failed quite early on - if you watch the very first few seconds one of the engines may not have properly started, or suffered a surge, right at the moment of launch. The rest, as they say, is history, with the inevitable instability and finally someone hitting the payload self destruct button and the collapse of the remaining engines and fuel systems.Bob Smith
Member of Seti PIPPS (Pluto is a Planet Protest Society)
Somewhere in the (un)known Universe?